Was thinking about this the other day (because why not?) and I think there could be an option to just fully demolish the broomload stand and start again. The original structure remains in essence to what we had before the TV/corner infill, so you could re-design a new stand with a few features in mind - bigger capacity, disabled seating, hiding the away fans further up the stand, hospitality etc, that wraps round to join the Govan, (and could even do the same towards the main stand - 'closing the gap').
Obviously cost/reward might still not be there, the overall symmetrical aesthetic to the ground would be lost and you would still have a 'dead' area of space where you don't have sightliness due to the Goven stand pillar, but if well enough designed it could overcome these.
Very much pie in the sky etc etc but just another option should we find ourselves with a spare £200m kicking about when Elon Musk decides to invest.